⚡ Core Logic: Waterfall ICP
BlitzAPI’s most popular feature is the Waterfall ICP Search. It solves a common engineering challenge: mapping a target account to the right decision-makers without manual filtering. Instead of retrieving a raw list of employees, you define a priority hierarchy. The API executes a cascading search until it matches your criteria.1
1. Define the Cascade
You configure a JSON rule: “First, look for the CEO in the US. If there are slots left, add the VP of Sales, then a Sales Director.”
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2. Intelligent Routing
The API searches the BlitzAPI B2B data infrastructure in priority order, stopping as soon as it has found
max_results people or has tried every tier.3
3. Structured Output
You receive up to
max_results decision-makers for that company (10 by default), best tier first, ready for enrichment. Set max_results: 1 to get only the single best match.Read the Waterfall Logic Docs
See how to construct hierarchical queries to maximize relevance.
Plans & Pricing
Every endpoint on every plan, from $99 a month
Plans differ by speed per endpoint, fair use policy and support, never by the data. New accounts get 1,000 free records every month, no card.
People Search Family
Three complementary endpoints: pick the one that matches your scope.Find People
Search decision-makers across many companies in one call. Combine company filters (industry, size, HQ) with person filters (job title, level, location).
Employee Finder
Map all employees at one specific company with paginated, filtered results.
Waterfall ICP Search
Get the best-fit decision-makers at a known company, in your priority order.
What do you want to build?
Select the documentation path that matches your technical goal.Quick Start
Get your API Key and run your first enrichment request via the SDK or cURL.
Official SDKs
Typed Python and TypeScript/JavaScript clients with retries, rate limiting per endpoint, and auto-pagination.
Connect Your AI (MCP)
One-click setup for Claude, Cursor, and more. Your AI can call every endpoint, read the docs, and use built-in skills.
Build an ICP List
Generate a fresh prospecting list across hundreds of accounts in one Find People call.
Full Workflow
Chain Search, Enrichment, and Validation into a single automated pipeline.
API Reference
Interactive OpenAPI documentation to test endpoints and view schema definitions.
Supported Integrations
BlitzAPI acts as the data engine behind your existing stack.Building a custom integration? Our API is platform-agnostic. As long as your tool can make an HTTP POST request, it works with BlitzAPI.